package com.nf.health.app.customview;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.RadioGroup;


/**
 * 流式布局的RadioGroup
 */
public class FlowRadioGroup extends RadioGroup {
    
    public FlowRadioGroup(Context context) {
        super(context);
    }

    public FlowRadioGroup(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int maxWidth = MeasureSpec.getSize(widthMeasureSpec);
        int childCount = getChildCount();
        int x = 0;
        int y = 0;
        int row = 0;

		for (int index = 0; index < childCount; index++) {
			final View child = getChildAt(index);
			if (child.getVisibility() != View.GONE) {
				child.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
				// 此处增加onlayout中的换行判断，用于计算所需的高度
				int width = child.getMeasuredWidth();
				int height = child.getMeasuredHeight();
				x += width;
				y = row * height + (height+row *10);
				if (x > maxWidth) {
					x = width;
					row++;
					y = row * height + (height+row *10);
				}
			}
		}
        // 设置容器所需的宽度和高度
        setMeasuredDimension(maxWidth, y);
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        final int childCount = getChildCount();
        int maxWidth = r - l;
        int x = -10;
        int y = 0;
        int row = 0;
        for (int i = 0; i < childCount; i++) {
            final View child = this.getChildAt(i);
            if (child.getVisibility() != View.GONE) {
                int width = child.getMeasuredWidth();
                int height = child.getMeasuredHeight();
				x += (width + 10);
				y = row * height + (height+row *10);
				if (x > maxWidth) {
					x = width;
					row++;
					y = row * height + (height+row *10);
				}
                child.layout(x - width, y - height, x, y);
            }
        }
    }
}
